Flanging-machine



H. McCABE FLANGING MACHINE.

APPLICATIGN FILED JULY 3. I919.

HUGH MCCABE, OF LAVJBENCE. MASSACHUSETTS.

FLANGING-MACHINE.

Specification of Letters Patent.

Patented A11 16', 1921.

Application filed July 3, 1919. Serial No. 308,513.

T 0 all whom it may concern:

Be it known that I, HUGH hiloiar a citizen of the United States, residing at Lawrence, in the county of Essex and State of Massachusetts, have invented certain new and useful improvements in Flanging-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a flanging machine and more particularly to a flanging machine of the McCabe type such as is disclosed in the patent to Hugh lileCabe, No. 1,006,861, dated October 1911.

In forming flanges 011 certain types of work in flanging machines of the McCabe ype above mentioned, it is sometimes desirable to turn down each increment of the flange through the entire angle of the flange with one operation of the bender, especially when the width of the flange is relatively small. In order to accomplish this result in a machi e of the above mentioned type, it has heretofore been necessary to shift the rack with relation to the segmental gear in order to effect a bend through angles of greater magnitude than approximately $0 The object of the present invention is to provide a flanging machine of the above mentioned type with an improved construction of bender whereby a flange may be turned through a much greater angle than that through which the bender is moved. To the accomplishment of this object the invention consists in the flanging machine hereinafter described and claimed.

In the drawing Figure 1 represents a suflicient portion of the flanging machine of the ilicCabe type to illustrate the invention, and Fig. 2 is a diagrammatic view illustrating the operation of the improved construction of bender.

The flanging machine illustrated in the drawing is described as follows: The work 10 which is to be flanged is clamped between a wedge 13 and a clamping block 1a. T he bender 15 is mounted upon a segmental bender carrier 16 which is provided with a segmental gear 17. The segmental gear 17 meshes with a rack 18 which is reciprocated by means of the pneumatic cylinder 19 and its piston and piston rod to impart an angular movement to the bender. The length of the rack 18 is such as to oscillate the bender through an angle of approximately 40. The bender l5 is provided with a don hie-faced work engaging member 22 having the faces 20 and 21 thereof angularly inclined to one another. The size of the work engaging face and its position with relation to the path of movement of the bender are such that when the bender starts on its initial it) degree movement, the work is engaged by the lower face ll of the work engaging member. After the bender has turned the flange through a certain angle, the second face 20 is brought into such position as to come in contact with the partially turned flange so that the bender is moved through the remaining portion of its dll arc the flange is turned by the face 20 approximately 90, more or less as desired.

It will be observed that with this design of bender, the rack 18 may be successively operated without shifting its position upon the segmental gear 17 in order to flange the work to approximately 90.

The design of the faces 20 and 21 of the work engaging surface 22 may be varied to accomplish various degrees of flanging and in each case the work may be flanged to the desired amount without shifting the position of the rack 18 with relation to the segmental gear 17.

The important feature of the invention resides in providing a Hanging machine with a bender of such design that a flange may be turned through a much greater angle than that through which the bender is moved.

The invention has been described and illustrated as embodied in a particular form of flanging machine but is to be understood that the same may be embodied in other forms within the scope of the following claims 1. A flanging machine having, in combination, an anvil over which the flange is turned, means for holding the work against the anvil, and a bender having two work engaging faces arranged at an angle to one another, the bender being movable in a path of such curvature that the apex of the angle formed by said faces moves on a surface concave with respect to the corner of the anvil.

Q. A flanging machine having, in combination, an anvil over which the flange is turned, means for holding the work against the anvil, and a bender having two flat work engaging faces arranged at an angle to one another the bender being movable in a path of such curvature that the apex oi the angle formed by said faces moves on a surface concave with respect to the corner of the anvil" 3. A flanging machine having, in combination, an anvil over which the flange is turned, means for holding the work against the anvil, and a bender having two work engaging faces angularly inclined on one another, the bender being movable in a path of such curvature that the apex of the angle formed by said faces is moved on a surface concave to the anvil and is wiped past the corner of the anvil.

f flanging machine having, in combination, an anvil over which the flange is turned, means for holding the work against the an vil, and a bender movable in a path concave to the anvil and having two work engaging faces adapted to successively contact the work to turn the flange.

5. A Hanging machine having, in combination, an anvil over which the flange is turned, means for holding the work against the anvil, and a bender movable in a curved path having two flat work engaging surfaces adapted to successively contact the work to turn the flange.

6. A flanging machine having, in combination, an anvil over which the flange is turned, means for holding the work against the anvil, and bender movable as a unit in the arc of a circle concave with respect to the anvil, and having two work engaging faces arranged to wipe the flange in a direction toward the edge of the flange during the entire movement of the benden '7. A flanging machine having, in combination means for holding the work, a bender movable in a circular path concave with respect to the portion of the work to be flanged, power actuated means for moving the bender, the bender being provided with two work engaging 't'aces angularly arranged to one another and adapted to successively contact the work as the bender is moved in its circular path 8. A flanging machine having, in combination, a work clamp including an anvil, a bender movable in a curved path concave with respect to the edge of the anvil over which the flange is turned, and means for moving the bender, the bender having two flat work engaging faces arranged at an angle to one another with the edge of intersection of the faces located adjacent the edge of the anvil.

HUGH MCCABE. 

